common/cmd_dcr.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * AMCC 4XX DCR Functions
  26  */
  27
  28 #include <common.h>
  29 #include <config.h>
  30 #include <command.h>
  31
  32 #if defined(CONFIG_4xx) && (CONFIG_COMMANDS & CFG_CMD_SETGETDCR)
  33
  34 unsigned long get_dcr (unsigned short);
  35 unsigned long set_dcr (unsigned short, unsigned long);
  36
  37 /* =======================================================================
  38  * Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
  39  * =======================================================================
  40  */
  41 int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
  42 {
  43         unsigned short dcrn;    /* Device Control Register Num */
  44         unsigned long value;    /* DCR's value */
  45
  46         unsigned long get_dcr (unsigned short);
  47
  48         /* Validate arguments */
  49         if (argc < 2) {
  50                 printf ("Usage:\n%s\n", cmdtp->usage);
  51                 return 1;
  52         }
  53
  54         /* Get a DCR */
  55         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  56         value = get_dcr (dcrn);
  57
  58         printf ("%04x: %08lx\n", dcrn, value);
  59
  60         return 0;
  61 }
  62
  63
  64 /* ======================================================================
  65  * Interpreter command to set an AMCC PPC 4xx Device Control Register
  66  * ======================================================================
  67 */
  68 int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  69 {
  70         unsigned short dcrn;    /* Device Control Register Num */
  71         unsigned long value;
  72
  73         /* DCR's value */
  74         int nbytes;
  75         extern char console_buffer[];
  76
  77         /* Validate arguments */
  78         if (argc < 2) {
  79                 printf ("Usage:\n%s\n", cmdtp->usage);
  80                 return 1;
  81         }
  82
  83         /* Set a DCR */
  84         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  85         do {
  86                 value = get_dcr (dcrn);
  87                 printf ("%04x: %08lx", dcrn, value);
  88                 nbytes = readline (" ? ");
  89                 if (nbytes == 0) {
  90                         /*
  91                          * <CR> pressed as only input, don't modify current
  92                          * location and exit command.
  93                          */
  94                         nbytes = 1;
  95                         return 0;
  96                 } else {
  97                         unsigned long i;
  98                         char *endp;
  99
 100                         i = simple_strtoul (console_buffer, &endp, 16);
 101                         nbytes = endp - console_buffer;
 102                         if (nbytes)
 103                                 set_dcr (dcrn, i);
 104                 }
 105         } while (nbytes);
 106
 107         return 0;
 108 }
 109
 110 /* =======================================================================
 111  * Interpreter command to retrieve an register value through AMCC PPC 4xx
 112  * Device Control Register inderect addressing.
 113  * =======================================================================
 114  */
 115 int do_getidcr (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 116 {
 117         unsigned short adr_dcrn;        /* Device Control Register Num for Address */
 118         unsigned short dat_dcrn;        /* Device Control Register Num for Data */
 119         unsigned short offset;          /* Register's offset */
 120         unsigned long value;            /* Register's value */
 121         char *ptr = NULL;
 122         char buf[80];
 123
 124         /* Validate arguments */
 125         if (argc < 3) {
 126                 printf ("Usage:\n%s\n", cmdtp->usage);
 127                 return 1;
 128         }
 129
 130         /* Find out whether ther is '.' (dot) symbol in the first parameter. */
 131         strncpy (buf, argv[1], sizeof(buf)-1);
 132         buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
 133         ptr = strchr (buf, '.');
 134
 135         if (ptr != NULL) {
 136                 /* First parameter has format adr_dcrn.dat_dcrn */
 137                 *ptr++ = 0; /* erase '.', create zero-end string */
 138                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 139                 dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
 140         } else {
 141                 /*
 142                  * First parameter has format adr_dcrn; dat_dcrn will be
 143                  * calculated as adr_dcrn+1.
 144                  */
 145                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 146                 dat_dcrn = adr_dcrn+1;
 147         }
 148
 149         /* Register's offset */
 150         offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
 151
 152         /* Disable interrupts */
 153         disable_interrupts ();
 154         /* Set offset */
 155         set_dcr (adr_dcrn, offset);
 156         /* get data */
 157         value = get_dcr (dat_dcrn);
 158         /* Enable interrupts */
 159         enable_interrupts ();
 160
 161         printf ("%04x.%04x-%04x Read  %08lx\n", adr_dcrn, dat_dcrn, offset, value);
 162
 163         return 0;
 164 }
 165
 166 /* =======================================================================
 167  * Interpreter command to update an register value through AMCC PPC 4xx
 168  * Device Control Register inderect addressing.
 169  * =======================================================================
 170  */
 171 int do_setidcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 172 {
 173         unsigned short adr_dcrn;        /* Device Control Register Num for Address */
 174         unsigned short dat_dcrn;        /* Device Control Register Num for Data */
 175         unsigned short offset;          /* Register's offset */
 176         unsigned long value;            /* Register's value */
 177         char *ptr = NULL;
 178         char buf[80];
 179
 180         /* Validate arguments */
 181         if (argc < 4) {
 182                 printf ("Usage:\n%s\n", cmdtp->usage);
 183                 return 1;
 184         }
 185
 186         /* Find out whether ther is '.' (dot) symbol in the first parameter. */
 187         strncpy (buf, argv[1], sizeof(buf)-1);
 188         buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
 189         ptr = strchr (buf, '.');
 190
 191         if (ptr != NULL) {
 192                 /* First parameter has format adr_dcrn.dat_dcrn */
 193                 *ptr++ = 0;     /* erase '.', create zero-end string */
 194                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 195                 dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
 196         } else {
 197                 /*
 198                  * First parameter has format adr_dcrn; dat_dcrn will be
 199                  * calculated as adr_dcrn+1.
 200                  */
 201                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 202                 dat_dcrn = adr_dcrn+1;
 203         }
 204
 205         /* Register's offset */
 206         offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
 207         /* New value */
 208         value  = (unsigned  long) simple_strtoul (argv[3], NULL, 16);
 209
 210         /* Disable interrupts */
 211         disable_interrupts ();
 212         /* Set offset */
 213         set_dcr (adr_dcrn, offset);
 214         /* set data */
 215         set_dcr (dat_dcrn, value);
 216         /* Enable interrupts */
 217         enable_interrupts ();
 218
 219         printf ("%04x.%04x-%04x Write %08lx\n", adr_dcrn, dat_dcrn, offset, value);
 220
 221         return 0;
 222 }
 223
 224 /***************************************************/
 225
 226 U_BOOT_CMD(
 227         getdcr, 2,      1,      do_getdcr,
 228         "getdcr  - Get an AMCC PPC 4xx DCR's value\n",
 229         "dcrn - return a DCR's value.\n"
 230 );
 231 U_BOOT_CMD(
 232         setdcr, 2,      1,      do_setdcr,
 233         "setdcr  - Set an AMCC PPC 4xx DCR's value\n",
 234         "dcrn - set a DCR's value.\n"
 235 );
 236
 237 U_BOOT_CMD(
 238         getidcr,        3,      1,      do_getidcr,
 239         "getidcr - Get a register value via indirect DCR addressing\n",
 240         "adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn.\n"
 241 );
 242
 243 U_BOOT_CMD(
 244         setidcr,        4,      1,      do_setidcr,
 245         "setidcr - Set a register value via indirect DCR addressing\n",
 246         "adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn.\n"
 247 );
 248
 249 #endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */